<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="refresh" content="3;url=/reg.html">
    <title>Register Failed</title>
</head>
<body>
<center>
      <h1><a href="/reg.html">该用户名已存在，请重新输入！！！</a></h1>
    3秒后自动跳转 <a href="/reg.html">注册页面</a>
</center>
</body>
</html>